摘要
本文对不同射流注入角的典型单排孔冷却结构的平板气膜冷却特性进行了实验研究,研究对象为轴线与主流来流方向分别成30°、60°、90°的射流孔板,对它们在吹风比为0．5、1．0、1．5条件下的射流孔下游的绝热气膜冷却效率分布特性进行了分析。在吹风比M=0．5时,三个射流注入角条件下近孔区域都能形成较好的冷气覆盖效果;M=1．0时,三者的下游横向平均冷却效率基本相同;M=1．5时,注入角60°的条件下冷却效果最好。
This paper describes the current studies on the film cooling effectiveness of single-row holes in flat plate at different injection angles, including 30°, 60° and 90°. The distributions of adiabatic film cooling effectiveness downstream the film holes at three blowing ratios of 0.5, 1.0 and 1.5 are analyzed, respectively. According to the experimental results, good cooling effectiveness in the region near the film holes for the three injection angles is achieved at a blowing ratio M=0.5. The lateral averaged cooling effectiveness downstream the cooling holes for the three injection angles is approximately identical at the blowing ratio M=1.0. The cooling effectiveness with injection angle of 60° is the best among the three injection angles at the blowing ratio M = 1.5.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第3期409-411,共3页
Journal of Engineering Thermophysics
基金
国家863计划资助项目(No.2002AA503010No.2004AA503010)
关键词
气膜冷却
射流注入角
吹风比
冷却效率
film cooling
injection angle
blowing ratios
cooling effectiveness
